"No one knows who killed Mrs. Donaldson, or where she hid her fortune.  When Logan and his family move into her old house, Logan is dragged into trying to solve the mystery of his new friend, Arthur.  The pursuit of clues leads them straight into trouble, and ultimately to a derelict and creepy amusement park.  But little do the boys suspect that the closer they get to the truth, the more danger they're in..."--Back cover.

J.J., the search and rescue dog, is ready for a bit of rest and relaxation after solving the mystery of the missing chicks, but there is a new dog next door who is stealing the attention of Moosh and her chicks and the threat of a roaming possum keeps J.J. on the alert.

When eleven-year-old Kaci interrupts burglars in the process of robbing her house, she and her nosy elderly neighbor Mrs. Banducci are kidnapped and held hostage by the desperate and ruthless criminals.

"Nicky Roth should be happy--he's finally proven that his best friend, Aaron, and Aaron's younger sister, Mya, are missing. Better yet, the police are actually doing something: they've plastered the town with missing posters, and have organized weekend search parties for the kids. But Nicky can't seem to pry his eyes from the house across the street, especially after he sees a frantic SOS coming from Aaron's room in the Peterson house. After what...

When the proprietor of Leighton's Mercantile is found dead on the morning his annual Christmas shop display is to be unveiled, it's clear a killer had revenge in mind. But who would want to kill the local dry-goods merchant? Perhaps someone who remembers the mysterious scandal that destroyed his career as a professor and archaeologist. When the killer strikes again, each time manipulating the figures in the display to foretell the crime, Myrtle finds...

Andy and Tamika are watching their neighbors' house while they are away, but when strange and troubling things start happening inside the house, the police do not believe the children.

Teenager Olivia Danvers knows that the previous residents at 16 Olcott Place moved out in the middle of the night, but nobody really knows why; the new family, the Donahues, have three children including a daughter, Janie, Olivia's age, and the two becomeclose friends--but when the threatening letters start arriving from the "Sentry of Glennon Heights" the two girls realize that the house and town are hiding sinister secrets, which could tear their...

Squishy and her twin "bonus" sisters Vee and Jessie are intrigued when a Ming vase disappears from the apartment above them, especially when they find out it is apparently one of a set stolen during the Opium Wars--and when they hack into the apartment building's security cameras and see what appears to be the ghost of a Chinese warrior they are determined to investigate the mystery.

Squishy and her twin stepsisters, Vee and Jessie, are on the trail of a mystery; it starts with "Boring Lady" working in her office across the street at 2:57 in the morning, continues with the trashing of Mr. Hinkenbushel's apartment next door, and apparently involves illegal diamonds--and Squishy becomes convinced that Mr. Hinkenbushel is the diamond smuggler, only none of the grownups believe her.